The current average is: (25+45+50+36)/4
=39
Lara wants to increase her average by 4
So her average should be 43.
(25+45+50+36+x)/5=43
(156+x)/5=43
156+x=215
x=59
Lara has to score 59 in her next test to increase her average by 4
Answer:
use 2 variable for the problem. say pear=x apple=y.
3x+4y=1.6
Step-by-step explanation:
Unit rates is same as nominator in this case it will be:
You can fill the second in in the first to get an equation with only b:
(b-2) - 3b = 22 =>
-4b-2 = 22 =>
-4b = 24
b = -6
a = -6-2 = -8
So (-8,-6) is the answer.
